* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  /* 页面淡入动画 */
  body {
    opacity: 0.1;
    transition: opacity 1.5s ease-in-out;
  }

  body.loaded {
    opacity: 1;
  }

  .header {
    width: 100%;
    height: 5vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 11vw 0 13vw;
    box-sizing: border-box;
    background: rgba(0, 121, 254, 0.8);
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1000;
  }

  .logo {
    height: 2.5vw;
    display: flex;
    align-items: center;
  }

  .logo img {
    height: 100%;
    width: auto;
  }

  .nav-menu {
    display: flex;
    gap: 2.5vw;
    align-items: center;
    height: 100%;
  }

  .nav-item {
    font-size: 1vw;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s;
    white-space: nowrap;
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
  }

  .nav-item:hover,
  .nav-item.active {
    color: #fff;
    font-weight: bold;
  }

  .nav-item.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0.25vw;
    /* background-color: #fff; */
    background-color: #55D0FE;
    border-radius: 0.125vw 0.125vw 0 0;
  }


   .cooperation-btn img{
    width: 80%;
   }

  /* Footer */
  .footer{
    width: 100%;
    background-color: #1a1a1a;
    padding: 5vw 8.3vw 1.5vw 8.3vw;
    box-sizing: border-box;
  }

  .footer .footer-main{
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 2vw;
    border-bottom: 0.1vw solid rgba(255,255,255,0.1);
  }

  .footer .footer-main .footer-brand{
    width: 12vw;
    flex-shrink: 0;
  }

  .footer .footer-main .footer-brand .footer-logo{
    height: 2.5vw;
    margin-bottom: 1.5vw;
  }

  .footer .footer-main .footer-brand .footer-logo img{
    height: 100%;
    width: auto;
  }

  .footer .footer-main .footer-brand .footer-info{
    margin-bottom: 1vw;
  }

  .footer .footer-main .footer-brand .footer-info .info-item{
    margin-bottom: 0.5vw;
  }

  .footer .footer-main .footer-brand .footer-info .info-item .label{
    display: block;
    font-size: 0.7vw;
    color: rgba(255,255,255,0.5);
    margin-bottom: 0.2vw;
  }

  .footer .footer-main .footer-brand .footer-info .info-item .value{
    font-size: 0.7vw;
    color: rgba(255,255,255,0.8);
  }

  .footer .footer-main .footer-brand .footer-info .info-item .value.phone{
    font-size: 1vw;
    font-weight: bold;
    color: #fff;
  }

  .footer .footer-main .footer-brand .footer-qrcode{
    width: 4vw;
    height: 4vw;
    background-color: #fff;
    padding: 0.2vw;
    box-sizing: border-box;
    border-radius: 0.2vw;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .footer .footer-main .footer-brand .footer-qrcode .qrcode-placeholder{
    width: 100%;
    height: 100%;
    object-fit: contain;
  }

  .footer .footer-main .footer-links{
    display: flex;
    gap: 3vw;
    flex: 1;
    justify-content: center;
  }

  .footer .footer-main .footer-links .link-column{
    min-width: 5vw;
  }

  .footer .footer-main .footer-links .link-column .column-title{
    font-size: 0.8vw;
    font-weight: bold;
    color: #fff;
    margin-bottom: 0.8vw;
  }

  .footer .footer-main .footer-links .link-column ul{
    padding: 0;
    color: #0079fe;
  }

  .footer .footer-main .footer-links .link-column ul li{
    font-size: 0.7vw;
    line-height: 2;
    cursor: pointer;
    transition: color 0.3s;
    /* li 加上小圆点 */
    list-style-type: disc;

    padding-left: 0.1vw; 
    list-style-position: inside;
  }

  .footer .footer-main .footer-links .link-column ul li a{
    color: rgba(255,255,255,0.5);
    text-decoration: none;
  }

  .footer .footer-main .footer-links .link-column ul li:hover{
    color: rgba(255,255,255,0.8);
  }

  .footer .footer-main .footer-social{
    display: flex;
    flex-direction: column;
    gap: 0.5vw;
    flex-shrink: 0;
  }

  .footer .footer-main .footer-social .social-icon{
    width: 2vw;
    height: 2vw;
    border-radius: 0.3vw;
    cursor: pointer;
    transition: opacity 0.3s;
    background-color: #4a7dff;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  .footer .footer-main .footer-social .social-icon img{
    width: 60%;
    height: 60%;
    object-fit: contain;
  }

  .footer .footer-bottom{
    display: flex;
    /* justify-content: space-between; */
    align-items: center;
    padding-top: 1.5vw;
  }

  .footer .footer-bottom .copyright{
    font-size: 0.7vw;
    color: rgba(255,255,255,0.4);
  }

  .footer .footer-bottom .icp{
    display: flex;
    align-items: center;
    gap: 0.3vw;
    font-size: 0.7vw;
    margin: 0 auto;
    color: rgba(255,255,255,0.4);
  }

  .footer .footer-bottom .icp .icp-icon{
    font-size: 0.7vw;
  }

  /* 联系按钮 */
  .contact{
    position: fixed;
    top: 50%;
    right: 2%;
    transform: translateY(-50%);
    z-index: 99999;
  }

  .contact img{
    width: 3vw;
    display: block;
  }